Stopping mechanism for looms



March 22, 1932. w v. LINDSJO ET AL 1,850,306

STOPPING MECHANISM FOR LOOMS Filed Oct. 15, 1931 4 Sheets-Sheet lATTORNEY March'22,.l932. v. LINDSIO ETAL- STOPPING MECHANISM FOR LoomsFiled Oct. 4 Sheets-Shet 2 VE N OR Z? Maw ATTnI-PNF'Y March 3 v. LINDSJOET AL 1,850,306

STOPPING MECHANISM FOR LOOMS Filed Oct. 15, 1951 4 Sheets-Sheet 3 7lNl/f/VTCR BY WAN.

ATTORNEY March 22, 193 2. 7 v. LINDSJO ET AL 1,850,306

STOPPING MECHANISM FOR LOOMS Filed Oct. 15, 1931 4 Sheets-Sheet 4INVENTOR M42; it BY 0 42;} v m 1? Jul.)

Patented Mar. 22,; 1932 UNITED STATES? SETTS, ASSIGNORS TO DRAPERCORPORATION, OF, HOPEDALE, MASSACHUSETTS, ,A

CORPORATION OF MAINE PA/TENT; 1 arm VERNER LINDSJO, or HoPEnALni ANDLEONARD, mnoenn s, on MENDON, MASSACHU- s'rorrme MECHANISM Eon. LOOMSApplication filed October 15, 1931.. Serial'No. 569,016.

This invention relates to shuttle changing looms and is moreparticularly directed to mechanism for stopping loom operation shouldeither one of two loom parts be disturbed from their normal weavingposition.

Shuttle changing looms are of two general types, one of which eftectsachange in the shuttles by arresting the loom operation and the other ofwhich effects a change in the shuttles during the continued operation ofthe loom. The present invention is of the latter type and is associated*with a-shuttle changing loom which continues in operation during thechange of shuttles. 1

It is now the ordinary practice to. effect a change in the shuttles bythe substitution for I a shuttle in which the filling has become eitherbroken or substantially exhausted, by a shuttle containingafre'sh'supply of filling. I In effecting the shuttle change box platesof the change shuttle box are displaced from' their normal position topermitthe, exit of.

the depleted shuttle andthe entranceof a shuttle supplied with filling.Such displacement of the box plates maybe variously effected, but itWill happen at, timesthat one or the otherof the box plates will fail toreturn to normal Weaving position after shuttle change, with the resultthat if the shuttle is picked from the change box undensuch conditionsit is liable to be thrown through the warp threads, or get caught inthe-shed, or thrown out of the 100111 entirelyand probably to the injuryof the loom attendant.

Duringthe loomoperation should the shuttle get caught in the shed ortrapped the warp threads areliable to beinjured during the beat-upmovement of the lay. p

One of the important features of the pres-. ent invention consists in aloom stopping mechanism which shall be rendered effective to stop theloom in case either of the defective conditions stated takes place.Incarrying this feature of the invention intopractical effect the boxplates ofthe changeshutt e box or one of them is connected to astopinitiating mechanism and a loose reed is associated withanotherinitiating mechanism to effect loomstoppage in'case theshuttle getstrapped in the shed. Associated with 1 each of the stop initiatingmechanisms is a stop motion common to each, so that on the occurrence ofeither of the defective conditions noted, the common stop motion will berendered effective to stop the loom.

The invention and novel features thereof will best be made clear fromthe following description and accompanying drawings of one good formthereof.

In the draw1ngs:-

. Fig. l is a front to rear sectional elevation r Fig. 4 is aperspective View at the rear of the 1ay,some"ofthe parts beingishowninsection and others broken away for clearness of illustration.

The'loom frame 1 maybe of usual construction'for support of theoperating parts. The lay 2 is carried by the usual lay sword 3 and hasmovement towards and from the front of the loom, as usual, by the pitman4-.

The change shuttle box at one end of the lay comprises a back plate 5carried by arms. 6 pivotally mounted at 7 on brackets 8 secured to thefront of the lay. The front box plate 9 is carried by arms 10 mounted at11 atthe back of the lay. The back box plate 5 ISllOI'lll'illlj undertheimpulseof a spring 12, normally actmg to move the back box plate toweaving position after a changeof The front box plate 9 has an 1n-'shuttles.

"clined portion 13 and is normally held in its lower weaving position byan abutment or screw 14 carried by one or more of the arms 6 of the backbox plate, the efiect being that when the back box plate is raised byany appropriate mechanism the front box plate is free to be lifted bythe enteringshuttle", or as more fully explained in applicants copendingapplication Ser. No. 523,455,"filed March18, 1931. p

Secured to the arms of the back box plate is a downwardly extending tailpiece 15 which, on call for replenishment of filling, may be moved by anarm 16 extending from a shaft 17 supported on the loom frame and towhich is connected a downwardly extending arm 18 having a rearwardlyextending operating member 19 which, on call for replenishment offilling, may be engaged by a hunter 20. on the lay, with the result thatupon a shuttle change the back box plate will be lifted to permit theexit of the depleted shuttle and the incoming shuttle will itself liftthe front box plate 9 as the full shuttle is moved rearwardly into theshuttle box. It is not deemed necessary herein to enlarge upon thedetails of the mechanism for displacing the box plates for the change ofshuttles, as the details of suchmechanism form no essential part of thepresent invention and are more fully and clearly described in thecopending application above noted.

As hereinbefore stated, one at least of the box plates is associatedwith a stop initiating mechanism which, as shown in the present instance of the invention, consists of a shaft 21 supported by the lay forrocking movement and projecting from the shaft 21 is an arm 22 connectedby a link 23 to the back box plate 5, the construction being such thatwhen the back box plate is raised to permit the change of shuttles theshaft 21 will be rocked.

Secured to the rock shaft 21 at the oppo site side of the loom from thechanged shuttle box, as indicated in Fig. 4, is a pull finger 24, whichtogether with the shaft 21 and its connection with the back box plateconstitutes one of the stop initiating mechanisms.

Extending longitudinally of the lay is the reed 25, the upper endportion of which at 26 is mounted in the hand rail 27, for swingingmovement, and concentric with the shaft 21 is a sleeve 28 mounted insuitable bearings 29 carriedby the lay. Secured to the sleeve 28 andextending upwardly therefrom are the arms 30 to which is secured a reedloclb ing bar 31, Fig. 4, which is adapted to rest against the lower bar32 of the reed and maintain it yieldingly in weaving position under theimpulse of a spring 33, one end of which may be fixed to the bearing 29and the other end of which may be secured to an adjustable member 34secured to the sleeve.

The sleeve 23has secured thereto a dagger 35, Fig. 4, which under normalaction of the spring 33 will be held in its lowered or inoperativeposition. The dagger 35 together with the sleeve and parts describedrelative there to, constitute the second stop initiating mechanism.

Secured to and extending: frontwardly from the sleeve 28 is a lockingfinger 36 which, as the lay beats up, is adapted to engage beneath afixed lug 37 secured to the loom frame, the construction being such thatafter the shuttle ias been picked. thereed' 25 will be held yieldinglyin its operative weaving position by the spring controlled member 28,and arms 30, so that should a shuttle get trapped in the shed or notcomplete its picking movement, the reed is free yieldingly to movebackwardly, but should the shuttle not get trapped in the shed as thelay beats up the part will engage beneath the lug 37 and lock the reedfor the beat'up movement, as indicated more clearly in Fig. l. a

A hereinbefore stated, the two stop initiating mechanisms are associatedwith a common stop mechanism to effect loom stoppage on backwardmovement of the lay should the back box plate not return to normalweaving position after a change of shuttles, and effect loom stoppage onthe frontward movement of the lay should the shuttle get trapped in theshed.

The stop mechanism common to both initiating mechanisms comprises a stopmember 38 mounted on the loom frame for movement in two directions, andas shown is constituted asa stop rod mounteo. in bearings 39 forlongitudinal movement towards and from the front of the loom. Adjustablymounted on the stop rod 38 is a lug 40 adapted to be engaged by thehunter 35 when the latter is operatively positioned on frontwardmovement of the lay. Likewise, adjustably secured to the stop rod 38 isa second lug 41 adapted to be engaged on backward movement of the lay bythe pull finger 24, the lug 42 of which will engage frontward of the lug41 on backward movement of the lay should the back bOII plate 5 fail toreturn to weaving position after a change of shuttles.

As exemplifying the operative conditions above described it will benoted that in Fig. 2 the pull linger 24 is engaged with the lug 41 tomove the stop rod 38 rearwardly as the lay goes back, when the back boxplate has failed to return to normal weaving position after change ofshuttles. Likewise in Fig. 3 the position of parts, as indicated, showsthe engagement of the lug 40 by the bunt-er 35 to move the stop rodfrontwardlyshould the shuttle be trapped in the shed as the lay movestowards the front of the loom.

In addition to the stop rod 33 the loom stopping mechanism common toboth stop initiating mechanisms includes a shipper 43 pivotally mountedon the loom frame at and having a downwardly extending portion 45 whichis provided with a projection 46, the construction being such thatshould a rearward force be applied to the shipper 43 above its pivotalmounting 44, the loom will be stopped and should a frontward impulse beimparted to the lug 46 carried by the shipper below its pivotal mountingthe loom will again be stopped.

The stop rod 38 has pivotally connected thereto at 47 a shipperknock-off provided with an upwardly extendingarm 4:8 and a downwardlyextending'arm 49, the twoarms extending. to opposite sides of the pathof movement of thestop-rod. The upwardly extending arm 4-8 of theshipper knock-off has a shipper engaging portion 30,. whilejthe lowerarm 49 has an end portion 51 bearing upon the projection .46 of theshipper below its pivotal 'mounting, .the effect beingthat if the upperarm 48 of the shipper knock-cit is moved rearwardly from the positionindicated inFig. 1, theloom will bestopped and if the lower end portionof the shipper is moved :trontwardly by thelower arm 190f the shipperknock-oft, theloom will again be stopped. i v I To efiect thesemovements of the shipper knock-0E a fixed fulcrum stop;52 is providedabove the pivotal mounting of the shipper and a second fulcrum stop 53is provided below the pivotal mounting of theshipper and when the partsare in normal Weaving position, .as'indicated in Fig. 1, the upper andlower end portions of theshipper knock-off bear upon their fulcrumstops; Should theshipper rod38 bemoved rearwardly owing to the box platenothaving. returned'tonormal position, the shipper knock-off will turn"by the rod 5'5, both of which maybe connected to the shipper by'the.projec tion 56.

From the constructiondescribed as: one

good practical form of the present invention,

it will'be noted that should a'box plate notbe returned to its normalposition after the shuttle change, it will act through its initi: atingmechanism on the backward movement of the lay to actuate theloomstopping'mech anism or throw the shipper to its idle position, andshould the'shuttlebe trapped-in the shed the initiating mechanismassociated with the'loose reed will again act through the same loomstopping mechanism to stop the loomor throw the shipper to itsidleposition.

When the shuttle becomes trapped in the shed and the-dagger 35 isoperatively positioned to eifect, loom stoppage, it may be desirable toretain orzlock the dagger in such position with the reed displacedrearward ly and to thisend the dagger35 has pivotally connected theretoa locking. member 57, which. extends upwardly from the dagger through aloop 58 secured at the ,front'of the. lay.- In normal I weavingoperations, as

indicated in Fig.1, the locking member 57 is'initslowered position atwhich time a locking lug '59'is below the loop 58. When,.how-

ever, the loom -is stopped by reason of a trapped shuttle, the lockingmember 57-is raised to position the locking lug 59 above the loop 58, asindicated inFig. 3, whereupon the arms 30 and locking bar 31 of'the reedmay be held in their reed releasing position.

WVith the parts thus locked-the shuttle may be -readily removed from theshed whereupon the loom attendant may trip the locking member 57 throughthehand piece 60 at the top of the locking member. l The hopper for thefilled shuttles and the shuttle changing mechanism are notherein shownand described, because the details thereof form no part of the presentinvention and are fully and completely. described in the copendingapplication hereinbefore called to attention... I What is claimed is 1.Ina loom of the shuttle changing type,

the combination of the layohaving ashuttle box provided with box platesadapted to be displaced from their normal weavingpositions fortheentrance and ejection of a shuttle, loom stop initiatingudevicesoperatively positioned tor'efiect 1oom3 stoppage should one of the boxplates failto return to normal weaving positionafter a change. ofshuttles, a loose reed motion carried by thelay, loom stopinitiatingdevices operatively positioned to effect loom, stoppage shouldthe shuttle be. trapped .in the shed, and a train of mechanism common toand actuated by either of the initiating devices for stopping. the loomwhen the shuttle is trapped or. the box plate fails to return to normalposition:

2. Ina shuttle changing loom, the combination of. the lay, a reedmounted on the lay-for rearward displacement by a trapped 5 shuttle, ashuttle changing box having back and front box plates mountedfordisplaoement from normal weaving position for change of shuttles,"anda single train'of loom stopping mechanism adapted :to be; actuated toeflect loom stoppage when a shuttle gets trapped in the shed and alsowhen one of the box plates fails'to return to, normal weaving positionafter a change of shuttles.

3. Ina shuttle changingloom, the combination of the lay, a reedmountedon the lay forrearward displacement by a trapped shuttle, mechanismoperatively positioned to, cf feet loom stoppage by rearward idisplaceament of the reed, a shuttle box having box plates at least one of whichis mounted for displacement from normal weaving position for change ofshuttles, mechanism operatively positioned to effect loom stoppageshould one ofthe box plates fail to return to normal 1 weavingposition-after a change of shuttles, and loom stopping devicesr'commontoi'both said mechanisms for actuation by either to stop theloom.

4. In a shuttle changing loom, the combination of the lay, a reedmounted on the lay for rearward displacement by a trapped shuttle,mechanism operatively positioned to effect loom stoppage by rearwarddisplacern'ent' of'the reed, a shuttle box having box plates at leastone of which is mounted for displacement from normalweaving positionfor-change of shuttles,.1nechanism operative-' effect loom stoppage byrearward displacement of the reed, a shuttle box having box plates atleast one of which is mounted for displacement from normal weavingposition for change of shuttles, mechanism'operatively positioned: toeflect loom stoppage should one of the boxplates'fail to return tonormal weaving position after a change of shuttles, and loom stoppingdevices common to both said mechanisms for actuation by either to stopthe loom including a stop member mounted for movement in one directionby one of said mechanisms and in the oppo site direction by the other ofsaid mechanisms, and a shipper mounted for movement '5 in one directionby either movement of the stop member.

6. In a shuttle changing loom, the combination of the lay, a reedmounted on the lay for rearward displacement by a trapped shuttle,mechamsm includn'ig a dagger operatively positioned by rearwarddisplacem ent of the reed, a shuttle box having a box plate mounted fordisplacement for change of shuttles, mechanism including a finger operatively connected to the box plate, a stop 10d common to bothmechanisms and having a bunter for engagement by the operativelypositioned dagger to stop the loom on frontward movement ofthe lay, alugconnected to the stop rod for engagement by the operatively positionedlinger tostop the loom on rearward movement of the lay following changeof shuttles and failure of the box pl'ate'to return to normal weavingposition,

and a shipper actuated by stop rod movement in either direction. 'Z. Ina shuttle changing loom, the combinationv of the lay, a reed mounted onthe lay for rearward. displacement by a trapped shuttle, mechanismincluding a; d'agger'openatively positioned by rearward displacement ofthe reed,a shuttle box having a box plate mounted for displacement forchange of shuttles, mechanism including a finger operatively connectedto the box plate, a stop rod common to both mechanisms and having ahunter for engagement by the operatively positioned dagger to stop theloom on frontward movement of the lay, a lug connected to the stop rodfor engagement by the operatively positioned finger to stop the loom onrearward movement of the lay following change of shuttles and failure ofthe box plate to return to normal weaving position, shipper and aknock-01f member interposed between the stop rod and shipper.

8. In a shuttle changing loom, the combination of the lay, a reedmounted on the lay for displacement by a trapped shuttle, a shuttle boxhaving a 'box plate mounted for displacement for change of shuttles,devices carried by the lay and controlled by the reed, devices carriedby the lay and controlled by the position of thebox plate, and stopmechanism common to the two devices and rendered effective to stop theloom when the reed is displaced and when the box plate fails toreturnftonormal weaving position following a change of shuttles;

9. In a shuttle changing loom, the combination of the lay, a reedmounted for displacement by a trapped shuttle, a shuttle box having abox plate mounted for displacement for change of shuttles, twoconcentric rocking members mounted on the lay, one controlled in itsrocking movement by the reed and the other controlled in its rockingmovement by the box plate, devices on each rocking member to effect loomstoppage, a shipper, and means between the shipper and said devices andcommon to each of-them to knock off the shipper when a shuttle istrapped in the shed or the box plate fails to return to normal weavingposition after a change of shuttles.

10. In a stop motion for looms, the combination of a stop rod: mountedfor longitudinal movement, a shipper movable to and from loom runningposition, a shipper knock-ofl member mounted on the stop rod and havingtwo parts engageable with the shipper, a fixed stop engageable with oneend portion of the knock-off member to cause the said member to moveabout the fixed stop as the stop rod is moved in one direction to stopthe loom, and a projection connected to the shipper and engaged by theknock-oft member to cause the said member to move about another fixedstop to throw the shipper 'as the. stop rod is moved in the oppositedirection.

11. Ina stop mechanismforlooms,the combination of a stop'member movablein either of two directions to-efi'ect loomstoppage, a shippermovable'to and from loom running position, a knock-off member connectedto the stop member for swinging movement'relative thereto, a fulcrumstop at each side of the path of movement of the stop member about oneof which the knock-ofi' member may turn as a fulcrum when the stopmember 7 is moved in one direction to effect loom stop- 7 page and aboutthe other of which the knockoff member may turn as a fulcrum when thestop member is moved in the opposite direc of stop rod movement, afulcrum stop for the shipper knock-off at opposite sides-of the path ofstop rod movement about one of which the shipper knock-off may turn as afulcrum when the stop rod is moved from its normal position in onedirection to stop the loom and about the other of which the shipperknock-off may turn as a fulcrum when the stop rod is moved from normalposition in the opposite direction to stop the loom. 13. In a stopmechanism for looms, the combination of a stop rod mounted for movementin opposite directions from normal position to effect loom stoppage, ashipper pivotally mounted for movement to and from loom runningposition, a shipper ,knock-ofi' pivotally mounted on the stop rod andhaving oppositely extending arms for engagement with the shipper atopposite sides of its pivotal mounting, a fulcrum stop for the shipperknock-off at opposite sides of its pivotal connection with the stop rodand about one of which the shipper knock-01f may turn as a fulcrum uponmovement of the stop rod in one direction from normal position to effectloom stoppage and about the other of which the shipper knock-ofi'mayturn as a fulcrum upon movement of the stop rod from normal position inthe opposite direction to effect loom stoppage. I

14. In a stop mechanism for looms, the combination of a stop rod mountedfor movement in opposite directions from normal p0- as the stop rodismoved from its normal position;

In testimony whereof, we have signed our names to this specification;

VERNER LINDSJO. LEONARD M. ROGERS.

sition to effect loom stoppage, a shipper piv otally mounted formovement to and from loom running position and having a projection belowits pivotal mounting, a shipper knock-off connected to the stop rod forsw1ng ing movement in either directionand having an upperportion forknocking-off the shipper when the shipper knock-ofl' is swung in onedirection anda lower portion for knocking-ofi' the shipper when theshipper knocle d: swingingmovement of the shipper knock-0E off is swungin the opposite direction, and fulcrum' stops for determining thedirection of

